BottomNavigationBarTheme class Null safety

Applies a bottom navigation bar theme to descendant BottomNavigationBar widgets.

Descendant widgets obtain the current theme's BottomNavigationBarTheme object using BottomNavigationBarTheme.of. When a widget uses BottomNavigationBarTheme.of, it is automatically rebuilt if the theme later changes.

A bottom navigation theme can be specified as part of the overall Material theme using ThemeData.bottomNavigationBarTheme.

See also:



BottomNavigationBarTheme({Key? key, required BottomNavigationBarThemeData data, required Widget child})
Constructs a bottom navigation bar theme that configures all descendant BottomNavigationBar widgets.


child Widget
The widget below this widget in the tree.
final, inherited
data BottomNavigationBarThemeData
The properties used for all descendant BottomNavigationBar widgets.
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


createElement() InheritedElement
Inflates this configuration to a concrete instance.
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
toString({DiagnosticLevel minLevel =}) String
A string representation of this object.
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
toStringShort() String
A short, textual description of this widget.
updateShouldNotify(covariant BottomNavigationBarTheme oldWidget) bool
Whether the framework should notify widgets that inherit from this widget.


operator ==(Object other) bool
The equality operator.
@nonVirtual, inherited

Static Methods

of(BuildContext context) BottomNavigationBarThemeData
Returns the configuration data from the closest BottomNavigationBarTheme ancestor. If there is no ancestor, it returns ThemeData.bottomNavigationBarTheme. Applications can assume that the returned value will not be null.